atụmatụ:
1, The TPR adụ ihe onwunwe na ọbọp ke aka abụọ, okwukwe aka nwere a udidi, na abụọ isi nwere mgbochi ujo na mgbochi dobe ọrụ. O nwere ike ịbụ magnetik, họrọ ike magnetik magnetik ígwè, elu na nke ala n'akụkụ ndị na-arụ ọrụ na ihu, na ala nwere V ekara uzo, nke nwere ike tụrụ na gburugburu tube ụdị ihe
2, ihe: Aluminium